Question 1071300
So the general equation of a circle with center (h,k) is,
{{{(x-h)^2+(y-k)^2=R^2}}}
In this case, {{{h=k=0}}}
{{{x^2+y^2=R^2}}}
Using the point,
{{{7^2+0^2=R^2}}}
{{{R=7}}}
So then the area is,
{{{A=pi*R^2}}}
{{{A=pi*49}}}
{{{A=49pi}}}